Trimethylbenzenes, sulfonation

Chem. Descrip. 50-59.9% Calcium sulfonate in 40-49.9% It. aromatic petrol, naphtha (CAS 64742-95-6), 14.4% 1,2,4-trimethylbenzene, 1-4.9% 1,3,5-trimethylbenzene, 1-4.9% 1,2,3-trimethylbenzene Uses Rheology control agent, thixotrope, pigment antisettling agent for urethanes ai high-solids, solv.-based coatings (alkyd, acrylic, polyester, urethanes), baked and air-dried sterns Properties Bm. si. opaque thixotropic gel mild odor insol. in water sp.gr. 1.09 dens. 9.03 Ib/gal vise. 500,000 cps flash pt. (PMCC) 45 C 60% NVbywt. 

Other examples of the action of chlorosulfonic acid on polyalkylbenzenes include 1-ethyl-2,4,6-trimethylbenzene to give the 3-sulfonic acid 1,2,3,5- and 1,2,4,5-tetraethylbenzenes to give high yields of the 4- and 3-sulfonic acids respectively, also pentaethylbenzene gives the 6-sulfonic acid (89%). ... 

The application of pore-expended sulfonic acid SBA-15 has been demonstrated for the first time by Dacquin et al. (2012). In their smdy, the impact of pore-expended sulfonic functionalized SBA-15 toward palmitic acid in esterification and transesterification of tricaprylin and triolein has been explored. Large-pore SBA-15 was obtained by incorporation of trimethylbenzene (TMB) into Pluronic P123/tetraethyl orthosilicate (TEOS) and been aged for 1—3 days. Results showed pore diameters up to 14 nm were achieved through this method, with pore-expansion conferring >3-fold activity toward Cie FFAs esterification and Cg/Cig transesterification reaction (Dacquin et al., 2012). 

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